Do you remember anything about the password or what it could've resembled? I. E would it have had 8 characters, alphanumeric only or with special characters?
Do you know any passwords around the time also, there could be a style you've created with how you make them?
I only remember the first password I used
the password was then changed, I didn't remember
If you can't even remember characteristic of your password (such as password length, usage of special character, etc.), it's nearly impossible to recover your Bitcoin.
I only remember the first password I used
the password was then changed, I didn't remember
If you don't have any backup like seed phrase or private keys it will be hard to recover.
Bitcoin Core wallet doesn't give you seed, but only private key and master private key.